Steam-trap.



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` STEAM TRAP.

APPLIOATION FILED MAIL?. 1907.

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D. ARTHUR. STEAM TRAP.

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NESSES /NVE/VTOH ATTORNEY DANIEL ARTHUR, OF NEW YORK, N. Y.

STEAM-TRAP.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Applicata mi March 7. 1907. serai No. 361.125.

To all whom it may concern:

Be it known that I, DANIEL ARTHUR, a citizen of the United States, and aresident of New York, borough of Brooklyn, in the county of Kings andState of New York, have made and invented certain new and usefulImprovements in Steam-Traps, of which the following is a specification.

My invention relates to an improvement in traps for use in a system orline of steam pipes for draining therefrom the water of condensation,and particularly in steam heating systems, and is what l have termed acontraction trap, in contradistinction to an expansion trap used forlike purposes, in that in the latter the expansive force of a metal tubeor rod is employed for opening a valve to discharge the water ofcondensation, and the contraction of said rod or pipe to close thevalve, while in my improved device the contraction of the expansiblemember is utilized to open the valve for the discharge of the water ofcondensation, and the expansion of said member to close said valve. p

The object of the invention is to provide a device for this purposewhich shall be simple in construction, effective and certain in itsoperations, and the parts so arranged that they may be easily andreadily assembled or taken apart.

ith these and other ends in view, the invention consists in certainnovel features of construction and combinations of parts, as will behereinafter fully described andpointed out in the claims.

In the accompanying drawings, Figure l is a view in side elevation of myimproved trap. Fig. 2 is a rear view of the same. Fig. 3 is a sectionalview taken on the line 3 3 of Fig. 1, looking in thedirection of thearrow. Fig. 4 is a vertical sectional view showing the valve in its openposition. Fig. 5 is a sectional view of a part of the trap showing thevalve in its closed position. Fig. 6 is a similar view showing the partsso adjusted as to retain the valve in its open position.

Referring to the drawings, A represents a box or casing having formedthereon or secured thereto the wedge-shaped supports 7c, and whichcasing is threaded at one end to receive the inlet pipe B, and at theopposite end threaded to receive the outlet or discharge pipe C. Thisbox or casing is divided longitudinally by the wall or partition D intoa lower compartment d and an upper compartment, the latter beingsub-divided by the wall or partition E into the compartments e, e'. lnthe casing A is threaded the lower end of the pipe F, formed ofexpansible metal, preferably brass or iron, the upper end thereof beingclosed by means of the cap or plug f provided with the vertical stem f.Within this pipe F is located the pipe G, the lower end thereof beingthreaded or otherwise secured in the horizontal wall or partition D. Theupper end thereof, which extends within a short distance of the cap orplug f, is provided with a strainer g, this pipe or tube G beingpreferably made of thin iron, and is employed for the purpose ofdirecting the inflow of steam or water of condensation from the inletpipe B through the compartment d, and up through the entire length ofthe expansible tube F, prior to its discharge into the compartment d andout through the outlet pipe as hereinafter described, and as indicatedby the several arrows. On the upper extreme ends of the wedge-shapedbrackets or supports llc rests the lever K, bifurcated to form the twoarms k, k2, each of which arms is formed on its lower edge and near therear end with a recess 7c3 to receive -the point of the wedge-shapedsupport 7c.

In the horizontal partition D is formed an opening m4 leading from thecompartment d into the compartment c, and provided with the valve seatm, against which, when in its raised position, seats the valve M securedto the valve stem m, the latter passing up through the bonnet m2threaded in an opening formed in the casing A, and supporting on itsupper end the forward end of the lever K. Around the lower end of thestem fm is coiled a spring m3, one end of which bears against the bottomof a recess formed in the casing, and the other end against the valve M,the function of said sprin being to assist in raising said valve and hoding the latter tightly against its seat m.

From the above description, it will be seen that when the valve is inits lowered position, as illustrated in Figs. 4 and 6, the water ofcondensation will flow up into the expansible pipe F, down through thepipe G, into the compartment d, through the opening m4 into thecompartment o, and out through the discharge pipe C. When, however, thevalve is in its raised or closed position, as illustrated in Fig. 5, thetrap is closed and the passage of steam through it prevented.

On the upper end of the expansible member F is mounted a yoke,consisting of the two arms H, I, connected at the top by the cross pieceh, through an opening in which passes the vertical stem f formed on orsecured to the cap f, and is held thereon by means of the adjusting nuth', the lower ends of said yoke converging into the outwardly extendingarm J, the extreme lower ends of said arms H, I, being pointed orWedgeshaped and adapted to bear on the upper edges of the arms k', k2 ofthe lever K, and at points forward of those at which the upper ends ofthe supports 7c contact with the lower edges of said arm.

By means of this construction it will be seen that when a downwardpressure of the arms H, I, is exerted on the arms 7c', k2 of the leverK, the forward end of the latter will be lowered, said lever beingfulcrumed on the upper ends of the supports l/c and the pressure exertedthereon at points forward of said fulcrum, the length of the lever beingthe distance between the vertical planes in which the upper pointed endsof the supports k and lower pointed ends of the arms H, I ,lie. Thisleverage may be increased or diminished as desired, it being desirablewhen the trap is used in high pressure systems, to increase it in orderto render the same more powerful.

As the steam condenses in the system in which the trap is employed, itpasses into the latter through the inlet pipe B, up through theexpansible member or pipe F, down through the pipe G, and into thecompartment cl. As this water of condensation passes through theexpansible member F, the

atter is cooled, and by reason of the resulting contraction thereof, thearms H, I, exert a downward pressure on the lever K, the forward end ofwhich latter resting, as before described, on the upper end of the valvestem m', forcing the latter downwardly, thereby lowering the valve Mfrom its seat m and permitting the water of condensation to flow fromthe compartment d through the o ening m4 into the compartment e, and outt rough the outlet pipe.

After the trap has discharged the water of condensation, the steamentering the pipe F expands the same, thereby raising or lifting thearms-H, I, relieving the pressure thereof on the lever K. The steampassing down through the pipe G into the compartment d, raises the valveM against its seat m4, assisted by the coiled springs m3, and closingthe trap against the egress or outlet of the steam, the forward end ofthe lever K resting on the valve stem, being raised as illustrated inFig. 5'. If, however, it is desired to allow the steam to ilowl throughthe trap, the lever K may be lowered by means of the screw N, threadedin the arm J and turned down thereon, as illustrated in Fig. 6.

It will be evident from the foregoing that my improved trap isexceedingly simple in construction, comprises but few parts which arereadily assembled or taken apart, and that the same is capable ofperforming its functions in whatever position it may be employed.Furthermore, it will be evident that all the working parts of the trapmay be taken down while the steam is exerting its pressure on the valve,whereas in the ordinary type of expansion trap, such would beimpossible, as the pressure of steam would open the trap immediatelyupon the parts being loosened up.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is

l. In a trap of the character described, the combination with a valvecasing, of a *valvey seated therein and having an outwardly extendingstem, a movable member supported on said casing and bearing on saidstem, means for automatically moving said mem'- ber whereby the valvewill be opened, and

means carried by saidiirst mentioned means' for manually moving thesame, substantially as described.

2. In a trap of the character described, the combination with a valvecasing, ofa valve ver whereby the contraction of said 'member will movesaid levery to open the valve', and' manually operated means carried bysaid first mentioned means whereby the lever' may be moved,substantially as described.

Signed at New York, borough of Manhattan, in the county of New York, andState'of New York, this 5th day of March, A. D; 1907.

DANIEL ARTHUR,

Witnesses:

M. VAN NoRTwIcx, JoHNB. WHITE.

